/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.myfaces.tobago.internal.renderkit.renderer;

import org.apache.myfaces.tobago.component.DecorationPosition;
import org.apache.myfaces.tobago.component.Facets;
import org.apache.myfaces.tobago.component.SupportsAutoSpacing;
import org.apache.myfaces.tobago.component.SupportsDecorationPosition;
import org.apache.myfaces.tobago.component.SupportsHelp;
import org.apache.myfaces.tobago.component.SupportsLabelLayout;
import org.apache.myfaces.tobago.internal.component.AbstractUIButton;
import org.apache.myfaces.tobago.internal.component.AbstractUIInput;
import org.apache.myfaces.tobago.internal.component.AbstractUIOut;
import org.apache.myfaces.tobago.internal.component.AbstractUISelectOneChoice;
import org.apache.myfaces.tobago.internal.util.RenderUtils;
import org.apache.myfaces.tobago.internal.util.StringUtils;
import org.apache.myfaces.tobago.renderkit.css.BootstrapClass;
import org.apache.myfaces.tobago.renderkit.css.CssItem;
import org.apache.myfaces.tobago.renderkit.css.Icons;
import org.apache.myfaces.tobago.renderkit.css.TobagoClass;
import org.apache.myfaces.tobago.renderkit.html.CustomAttributes;
import org.apache.myfaces.tobago.renderkit.html.DataAttributes;
import org.apache.myfaces.tobago.renderkit.html.HtmlAttributes;
import org.apache.myfaces.tobago.renderkit.html.HtmlButtonTypes;
import org.apache.myfaces.tobago.renderkit.html.HtmlElements;
import org.apache.myfaces.tobago.util.ComponentUtils;
import org.apache.myfaces.tobago.util.ResourceUtils;
import org.apache.myfaces.tobago.webapp.TobagoResponseWriter;

import javax.faces.application.FacesMessage;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import java.io.IOException;
import java.util.List;

public abstract class DecorationPositionRendererBase<T extends UIComponent & SupportsLabelLayout & SupportsAutoSpacing>
    extends LabelLayoutRendererBase<T> {

  @Override
  public void encodeBeginInternal(FacesContext facesContext, T component) throws IOException {
    if (isInside(facesContext, HtmlElements.COMMAND)) {
      encodeBeginField(facesContext, component);
    } else {
      super.encodeBeginInternal(facesContext, component);
    }
  }

  @Override
  public void encodeEndInternal(FacesContext facesContext, T component) throws IOException {
    if (isInside(facesContext, HtmlElements.COMMAND)) {
      encodeEndField(facesContext, component);
    } else {
      super.encodeEndInternal(facesContext, component);
    }
  }

  @Override
  public void encodeBeginMessageField(final FacesContext facesContext, final T component) throws IOException {
    final TobagoResponseWriter writer = getResponseWriter(facesContext);
    final Integer tabIndex = component instanceof AbstractUIInput ? ((AbstractUIInput) component).getTabIndex() : null;
    final SupportsDecorationPosition supportsDecorationPosition = component instanceof SupportsDecorationPosition
        ? ((SupportsDecorationPosition) component) : null;

    final DecorationPosition helpPosition = supportsDecorationPosition != null
        ? supportsDecorationPosition.getHelpPosition() : DecorationPosition.none;
    final String help = component instanceof SupportsHelp ? ((SupportsHelp) component).getHelp() : null;

    if (!StringUtils.isEmpty(help)) {
      writer.startElement(HtmlElements.DIV);
      writer.writeClassAttribute(TobagoClass.HELP__CONTAINER, TobagoClass.valueOf(helpPosition));
      writer.writeAttribute(DataAttributes.HELP, help, true);

      switch (helpPosition) {
        case buttonLeft:
          final String title = ResourceUtils.getString(facesContext, "help.title");
          encodePopover(writer, BootstrapClass.BTN_OUTLINE_INFO, Icons.QUESTION_LG, title, help, tabIndex);
          break;
        case textTop:
          writer.startElement(HtmlElements.DIV);
          writer.writeClassAttribute(BootstrapClass.HELP_FEEDBACK);
          writer.writeText(help);
          writer.endElement(HtmlElements.DIV);
        default:
      }
    }

    final DecorationPosition messagePosition = supportsDecorationPosition != null
        ? supportsDecorationPosition.getMessagePosition() : DecorationPosition.none;
    final String clientId = component.getClientId();
    final List<FacesMessage> messages = facesContext.getMessageList(clientId);
    final String message = getMessage(messages);
    final FacesMessage.Severity severity = ComponentUtils.getMaximumSeverity(messages);

    if (!StringUtils.isEmpty(message)) {
      writer.startElement(HtmlElements.DIV);
      writer.writeClassAttribute(TobagoClass.MESSAGES__CONTAINER, TobagoClass.valueOf(messagePosition));
      writer.writeAttribute(DataAttributes.FACES_MESSAGE, message, true);

      switch (messagePosition) {
        case buttonLeft:
          final CssItem buttonColor = BootstrapClass.buttonColor(severity);
          encodePopover(writer, buttonColor, Icons.EXCLAMATION_LG, getTitle(facesContext, messages), message, tabIndex);
          break;
        case textTop:
          final CssItem feedback = BootstrapClass.feedbackColor(severity);
          writer.startElement(HtmlElements.DIV);
          writer.writeClassAttribute(feedback);
          writer.writeText(message);
          writer.endElement(HtmlElements.DIV);
        default:
      }
    }

    encodeBeginField(facesContext, component);
  }

  @Override
  public void encodeEndMessageField(final FacesContext facesContext, final T component) throws IOException {
    final TobagoResponseWriter writer = getResponseWriter(facesContext);
    final Integer tabIndex = component instanceof AbstractUIInput ? ((AbstractUIInput) component).getTabIndex() : null;
    final SupportsDecorationPosition supportsDecorationPosition = component instanceof SupportsDecorationPosition
        ? ((SupportsDecorationPosition) component) : null;

    encodeEndField(facesContext, component);

    final DecorationPosition messagePosition = supportsDecorationPosition != null
        ? supportsDecorationPosition.getMessagePosition() : DecorationPosition.none;
    final String clientId = component.getClientId();
    final List<FacesMessage> messages = facesContext.getMessageList(clientId);
    final String message = getMessage(messages);
    final FacesMessage.Severity severity = ComponentUtils.getMaximumSeverity(messages);

    if (!StringUtils.isEmpty(message)) {
      switch (messagePosition) {
        case buttonRight:
          final CssItem buttonColor = BootstrapClass.buttonColor(severity);
          encodePopover(writer, buttonColor, Icons.EXCLAMATION_LG, getTitle(facesContext, messages), message, tabIndex);
          break;
        case tooltip:
          final CssItem tooltip = BootstrapClass.tooltipColor(severity);
          writer.startElement(HtmlElements.DIV);
          writer.writeClassAttribute(tooltip);
          writer.writeText(message);
          writer.endElement(HtmlElements.DIV);
          break;
        case textBottom:
          final CssItem feedback = BootstrapClass.feedbackColor(severity);
          writer.startElement(HtmlElements.DIV);
          writer.writeClassAttribute(feedback);
          writer.writeText(message);
          writer.endElement(HtmlElements.DIV);
        default:
      }

      writer.endElement(HtmlElements.DIV);
    }

    final DecorationPosition helpPosition = supportsDecorationPosition != null
        ? supportsDecorationPosition.getHelpPosition() : DecorationPosition.none;
    final String title = ResourceUtils.getString(facesContext, "help.title");
    final String help = component instanceof SupportsHelp ? ((SupportsHelp) component).getHelp() : null;

    if (!StringUtils.isEmpty(help)) {
      switch (helpPosition) {
        case buttonRight:
          encodePopover(writer, BootstrapClass.BTN_OUTLINE_INFO, Icons.QUESTION_LG, title, help, tabIndex);
          break;
        case tooltip:
          writer.startElement(HtmlElements.DIV);
          writer.writeClassAttribute(BootstrapClass.HELP_TOOLTIP);
          writer.writeText(help);
          writer.endElement(HtmlElements.DIV);
          break;
        case textBottom:
          writer.startElement(HtmlElements.DIV);
          writer.writeClassAttribute(BootstrapClass.HELP_FEEDBACK);
          writer.writeText(help);
          writer.endElement(HtmlElements.DIV);
        default:
      }

      writer.endElement(HtmlElements.DIV);
    }
  }

  protected abstract void encodeBeginField(FacesContext facesContext, T component) throws IOException;

  protected abstract void encodeEndField(FacesContext facesContext, T component) throws IOException;

  private String getTitle(FacesContext facesContext, final List<FacesMessage> messages) {
    int fatalCount = 0;
    int errorCount = 0;
    int warningCount = 0;
    int informationCount = 0;

    final String fatal = ResourceUtils.getString(facesContext, "severity.fatal");
    final String error = ResourceUtils.getString(facesContext, "severity.error");
    final String warn = ResourceUtils.getString(facesContext, "severity.warn");
    final String info = ResourceUtils.getString(facesContext, "severity.info");

    for (final FacesMessage message : messages) {
      if (FacesMessage.SEVERITY_FATAL.equals(message.getSeverity())) {
        fatalCount++;
      } else if (FacesMessage.SEVERITY_ERROR.equals(message.getSeverity())) {
        errorCount++;
      } else if (FacesMessage.SEVERITY_WARN.equals(message.getSeverity())) {
        warningCount++;
      } else if (FacesMessage.SEVERITY_INFO.equals(message.getSeverity())) {
        informationCount++;
      }
    }

    final StringBuilder stringBuilder = new StringBuilder();

    if (messages.size() > 1) {
      if (fatalCount > 0) {
        stringBuilder.append(fatal).append(" (").append(fatalCount).append(")");

        if (errorCount + warningCount + informationCount > 0) {
          stringBuilder.append(", ");
        }
      }

      if (errorCount > 0) {
        stringBuilder.append(error).append(" (").append(errorCount).append(")");

        if (warningCount + informationCount > 0) {
          stringBuilder.append(", ");
        }
      }

      if (warningCount > 0) {
        stringBuilder.append(warn).append(" (").append(warningCount).append(")");

        if (informationCount > 0) {
          stringBuilder.append(", ");
        }
      }

      if (informationCount > 0) {
        stringBuilder.append(info).append(" (").append(informationCount).append(")");
      }
    } else {
      if (fatalCount == 1) {
        stringBuilder.append(fatal);
      } else if (errorCount == 1) {
        stringBuilder.append(error);
      } else if (warningCount == 1) {
        stringBuilder.append(warn);
      } else if (informationCount == 1) {
        stringBuilder.append(info);
      }
    }
    return stringBuilder.toString();
  }

  private String getMessage(final List<FacesMessage> messages) {
    final StringBuilder stringBuilder = new StringBuilder();
    boolean firstMessage = true;
    for (final FacesMessage message : messages) {
      if (firstMessage) {
        firstMessage = false;
      } else {
        stringBuilder.append("\n\n");
      }
      stringBuilder.append(message.getDetail());
    }
    return stringBuilder.toString();
  }

  private void encodePopover(
      final TobagoResponseWriter writer, final CssItem buttonColor, final Icons icon, final String title,
      final String content, final Integer tabIndex) throws IOException {
    writer.startElement(HtmlElements.TOBAGO_POPOVER);
    writer.writeAttribute(CustomAttributes.LABEL, title, true);
    writer.writeAttribute(HtmlAttributes.VALUE, content, true);

    writer.startElement(HtmlElements.A);
    writer.writeAttribute(HtmlAttributes.TABINDEX, tabIndex != null ? tabIndex : 0);
    writer.writeAttribute(HtmlAttributes.ROLE, HtmlButtonTypes.BUTTON);
    writer.writeClassAttribute(BootstrapClass.BTN, buttonColor);
    writer.startElement(HtmlElements.I);
    writer.writeClassAttribute(icon);
    writer.endElement(HtmlElements.I);
    writer.endElement(HtmlElements.A);

    writer.endElement(HtmlElements.TOBAGO_POPOVER);
  }

  protected void encodeGroupAddon(
      final FacesContext facesContext, final TobagoResponseWriter writer, final UIComponent addon,
      final boolean isAfterFacet) throws IOException {
    if (addon != null) {
      for (final UIComponent child : RenderUtils.getFacetChildren(addon)) {
        insideBegin(facesContext, isAfterFacet ? Facets.after : Facets.before);
        if (child instanceof AbstractUIButton) {
          child.encodeAll(facesContext);
        } else if (child instanceof AbstractUIOut) {
          child.encodeAll(facesContext);
        } else if (child instanceof AbstractUISelectOneChoice) {
          child.encodeAll(facesContext);
        } else {
          writer.startElement(HtmlElements.SPAN);
          writer.writeClassAttribute(BootstrapClass.INPUT_GROUP_TEXT);
          child.encodeAll(facesContext);
          writer.endElement(HtmlElements.SPAN);
        }
        insideEnd(facesContext, isAfterFacet ? Facets.after : Facets.before);
      }
    }
  }

}
